mirror of
https://github.com/obgm/libcoap.git
synced 2026-11-07 10:12:53 +03:00
Olaf Bergmann
0d78eab2e1
Two new functions coap_malloc_type() and coap_free_type() have been added to centralize the typed memory allocation for Contiki and LWIP. Currently, calls to memb_alloc(), memp_malloc() and coap_malloc() are distributed across several modules. The idea of the new functions is to centralize memory management in one place (mem.c). coap_malloc() and coap_free() are still available as wrappers for the new functions.
96 lines
1.7 KiB
C
96 lines
1.7 KiB
C
/* mem.c -- CoAP memory handling
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*
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* Copyright (C) 2014 Olaf Bergmann <bergmann@tzi.org>
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*
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* This file is part of the CoAP library libcoap. Please see
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* README for terms of use.
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*/
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#include "config.h"
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#include "mem.h"
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#ifdef HAVE_MALLOC
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#include <stdlib.h>
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void
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coap_memory_init() {
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}
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void *
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coap_malloc_type(coap_memory_tag_t type, size_t size) {
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return malloc(size);
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}
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void
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coap_free_type(void *p) {
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free(p);
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}
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#else /* HAVE_MALLOC */
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#ifdef WITH_CONTIKI
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#define COAP_MAX_STRING_SIZE 12
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#define COAP_MAX_STRINGS 8
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typedef struct {
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coap_memory_tag_t type;
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char data[];
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} coap_memory_item_t;
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struct coap_string_t {
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coap_memory_tag_t type;
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char data[COAP_MAX_STRING_SIZE];
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};
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MEMB(string_storage, struct coap_string_t, COAP_MAX_STRINGS);
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static struct memb *
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get_container(coap_memory_tag_t type) {
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switch(type) {
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default:
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return &string_storage;
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}
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}
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void
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coap_memory_init() {
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memb_init(&string_storage);
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}
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void *
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coap_malloc_type(coap_memory_tag_t type, size_t size) {
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struct memb *container = get_container(type);
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coap_memory_item_t *item;
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assert(container);
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if (size + sizeof(coap_memory_item_t) > container->size) {
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debug("coap_malloc_type: Requested memory exceeds maximum object size\n");
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return NULL;
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}
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item = (coap_memory_item_t *)memb_alloc(container);
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if (item != NULL) {
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item->type = type;
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return item->data;
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} else {
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debug("coap_malloc_type: insufficient memory\n");
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return NULL;
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}
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}
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void
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coap_free_type(void *object) {
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coap_memory_item_t *item;
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if (object) {
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item = (char *)object - sizeof(coap_memory_item_t);
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memb_free(get_container(item->type), item);
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}
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}
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#endif /* WITH_CONTIKI */
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#endif /* HAVE_MALLOC */
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